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Technology First invites you to participate in the 13th Annual Ohio Information Security Conference
Wednesday, March 9, at the Sinclair Community College Ponitz Center.  
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Wednesday, March 9 • 10:25am - 11:15am
You are How You Query: Deriving Behavioral Fingerprints from DNS Traffic

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As the Domain Name System (DNS) plays an indispensable role in a large number of network applications including those used for malicious purposes, collecting and sharing DNS traffic from real networks are highly desired for a variety of purposes such as measurements and system evaluation. However, information leakage through the collected network traffic raises significant privacy concerns and DNS traffic is not an exception. In this talk, we will show a new privacy risk introduced by passively collected DNS traffic. We intend to derive behavioral fingerprints from DNS traces, where each behavioral fingerprint targets at uniquely identifying its corresponding user and being immune to the change of time. We have proposed a set of new patterns, which collectively form behavioral fingerprints by characterizing a user's DNS activities through three different perspectives including the domain name, the inter-domain relationship, and domains' temporal behavior..We have performed extensive evaluation based on a large volume of DNS queries collected from a large campus network across two weeks. The evaluation results have demonstrated that a significant percentage of network users with persistent DNS activities have DNS behavioral fingerprints. 

avatar for Junjie Zhang

Junjie Zhang

Wright State University
Junjie Zhang is an Assistant Professor in the Department of Computer Science and Engineering at Wright State University. He received his Ph.D. in Computer Science from Georgia Institute of Technology in 2012. He also received his M.S. in Systems Engineering and B.S. in Computer Science from Xi'an Jiaotong University, China, in 2006 and 2003, respectively. His current research focuses on network security and Cyber-Physical System security.

Wednesday March 9, 2016 10:25am - 11:15am
Room 116 Sinclair Ponitz Center